
The quantization gain \(\alpha \)  is defined as \(\alpha \!=\! 1- \beta \)  where \(\beta \) 's are listed in Table 1 in [1]} for \(b \le 5\)  assuming \({\bf s}_i\!\sim \!\mathcal {CN}({\bf 0}_{N_u},{\bf I}_{N_u}), \forall i\in \lbrace 1,\ldots ,N_c\rbrace \) .
